Change the tool bar

I don't require all the options in the 'Full' tool bar, but I need more options than in the 'Basic' tool bar.

I tried searching for the 'plugin.js' under 'Toolbar' folder under 'Plugins' but didn't find any such folder. I found a file 'plugin.js' under the 'Toolbar' folder under the 'Plugins' folder under '_source' folder. But editing it didn't change the tool bar displayed.

Any help would be nice.